February 2001
Beginner to intermediate
448 pages
9h 2m
English
Content preview from Korn Shell Programming by Example
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[
Official Description
Begins a comparison.
Syntax
[ expression ]
Options
-a can be used as a logical and operator in compound tests.
-o can be used as a logical or operator in compound tests.
Oddities
It has pretty much been replaced by the [[ ]] command.
It's similar to the test command.
Example
$ [ -x buzz ] $ echo $? 0 # buzz is executable $ $ [ -x core ] $ echo $? 1 # core is not executable $
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.